linux-kernel - Re: [PATCH v1 0/5] mm: improve performance of accounted kernel memory allocations

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Message-ID: <n3x64d2wk7qr42tvcmqisbbrntppcwe6omv6li67ui6rz6umyk@wativjrwvh5g>
Date:   Wed, 4 Oct 2023 20:32:39 +0200
From:   Michal Koutný <mkoutny@...e.com>
To:     Roman Gushchin <roman.gushchin@...ux.dev>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        cgroups@...r.kernel.org, Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Shakeel Butt <shakeelb@...gle.com>,
        Muchun Song <muchun.song@...ux.dev>,
        Dennis Zhou <dennis@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Rientjes <rientjes@...gle.com>,
        Vlastimil Babka <vbabka@...e.cz>
Subject: Re: [PATCH v1 0/5] mm: improve performance of accounted kernel
 memory allocations

On Fri, Sep 29, 2023 at 11:00:50AM -0700, Roman Gushchin <roman.gushchin@...ux.dev> wrote:
> This patchset improves the performance of accounted kernel memory allocations
> by ~30% as measured by a micro-benchmark [1]. The benchmark is very
> straightforward: 1M of 64 bytes-large kmalloc() allocations.

Nice.
Have you tried how these +34% compose with -34% reported way back [1]
when file lock accounting was added (because your benchmark and lock1
sound quite similar)?
(BTW Is that your motivation (too)?)

Thanks,
Michal

[1]  https://lore.kernel.org/r/20210907150757.GE17617@xsang-OptiPlex-9020/

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